Motor-car



(N0 Model.) I 2 Sheets-Sheet 1.

G. K. MUNRO, Jr;

MOTOR GAR. No. 590,848. Patented Sept. 28,1897. I

\ iiif WITNES ES. Y LN VEJV'TQR.

UNITED STATES GEORGE KIRK'MUNRO, JR, OF DETROIT, MICHIGAN.

MOTOR-CAR.

SPECIFICATION'forming part of Letters Patent No. 590,848, dated September 28, 1897.

- Application filed March 25, 1897. Serial No. 629,271. (No model.)

To all whom it may concern:

Be it known that I, GEORGE KIRK MUNRO, J r., a citizen of the United States, residing at Detroit, county of \Vayne, State of Michigan, have invented certain new and useful Improvements in Motor-Oar Equipment; and

I declare the following to be a clear, full, and exact description of the invention, such as will enable others skilled in the art to'which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The object of this invention is to provide a flexible connection between the motor and the axle of the car-wheels and at the same time to provide for driving both axles and both sets of car-wheels from a single central motor.

In the drawings, Figure-l is a plan View of the truck to which my invention is applied. Fig. 2 is a side elevation of the equipment of the truck-frame, the axles beingin section: Fig. 3 is a horizontal section, on an enlarged scale, through the connections of one end of the driving mechanism and an axle. Fig, 4 is a sectional view, on a large scale, showing the means of adjusting the gear-wheel on the axle up to the pinion by which it is driven.

Fig. 5 is a detail of the supporting-arm D and its immediate connections; Fig. 6 is a plan View of the roller-bearings used between the axle and the gear-wheel J. Fig. 7 is an Fig. 8.

' tudinally of the truck and connects at each end by a flexible or universal" joint with a short shaft, upon which is mounted a pinion that meshes with a beveled gear on the caraxle; and the features to which I call .special attention are this flexible joint and the means by which the beveled pinion is arranged to be kept in mesh with the beveled gear on the axle.

The construction at one end of the truck is precisely similar to that at the other end, and a description of the construction at one end will suffice to a full understanding of the entire device. I

0 indicates the motor,and o the motor-shaft, the axis of which is lengthwise of the cartruck. a

indicates an axle of the wheels, upon which there is hung a casting in which the'axle revolves. The casting has two bearings, and over the bearings are two caps 61 6, held to the bearingiby suitable bolts and having preferably interposed under the caps and above the bearings roller-bearings. (Shown in detail in Figs. 6 and 7 and shown in position in Fig. 3.) The rollers of the rollerbearings are inclosed in a movable box h,

which is provided with a lug or lugs h and' the end of which bears against a face of the beveled gearj. I 1

The beveled gear j is keyed or otherwise secured tothe axle of the truck, and there is interposed between the face of this gear and that face of the box h which lies next to it a number of balls 0 in a circular groove or track properly constructedfor their reception. The box it is adapted to have movement along the axis of the axle 7t, and the lugs h project into cavities-in the cap and engage with the inner ends of set-screws i, which pass through the web of the cap 6 and bear against the lugs 72," and are adapted to force'the box 72 againstthe'beveled gear-wheel j and force that wheel into close engagement withthe pinion g. The pinion gand the gear-wheelj are both shrouded topitch-line both at the outer and at the inner end of the teeth, and the shrouds engage closely, and consequently the movement of the'gear-wheel jalong the axle or the similar movement of the pinion along its axle cannot bring the pinion'an'd the gear-wheel into a closer engagement than that which is proper.

The shaft Z) of the pinion g is borne in a pocket-bearing in the casting A. The inner end of the shaft 1) runs on roller-bearings, and the outer end also runs in roller-bearings that are themselves borne in a shell 0,

that bears endwiseagainst the face of the ing them in proper engagement under all conditions; but these gear-wheels are to be driven from the shaft '0, and in order that they may be so driven and so allowance may be made for the twisting or rocking move ment of the truck and the consequent rocking or twisting of the shaft with respect to the bearings I provide a universal-joint connection between the end of the shaft 1; and the end of the shaftb. The two shafts are in axial alinement, and on one of them, I), is borne a forked head 1', that is swiveled to an external ring 13. On the other one, "u, is carried a forked head 3, into which through the rectangular openings in the ring 13 project swivel-pins 8. These pins are rectangular at their outer en ds and round at their inner ends and the rectangular outer end of which is shorter than the rectangularhole in which it engages. The forked head 8 swivels on the round inner ends of the pins 5, and the shaft, with the head and with the pins, is capable of endwise movement in the rectangular holes a. This form of universal flexible joint permits not only universal fiection, but also permits a sufficient amount of endwise. movement to compensate for the wrenching, twisting, or straining of the car-truck.

At each end of the motor is a cross-bar z of the main frame, and from these cross-bars the motor is hung by suitable stirrups and stirrup-plates, and from the bottom of the stirrup-plate an arm D projects in each direction toward the casting A, reaching underneath the joint which unites the two shafts and supporting at its extremity a bearingplate on which the end of the castingA rests, preferably with a pair of interposed springs to to, so arranged that any tendency to lift the end of the casting A off from the arm is counteracted by compression of the spring 10, and anytendency of the casting A to bear down on the arm is resisted by the compression of the spring 11.". The two springs row are arranged the one above the arm D and between it and the casting A and the other below the arm D and between it and a washer on the head of the bolt What I claim is 1. In combination with a car-truck, a motor mounted thereon, driving-gear mounted on the car-axle, a shaft to the motorand a shaft for the driving-gear normally in alinement with the motor-shaft, a coupling between the two' shafts consisting of a forked terminal for each shaft, a ring, a swivel engagement between the ring and one of the said forks, swivel-pins engaging the other of said forks and provided with rectangular extensions that engage in rectangular holes in said ring,each rectangular hole being slightly larger in the direction of the longitudinal axis of the shaft than the pin which engages in it whereby the coupling is adapted to allow universal flection and variation of axial length of the compound shaft, substantially as described.

2. In combination with a car-truck, a motor, gearing mounted on each of the two axles of the car-truck, a motor-shaft, shafts for the gearing on each of the two axles both being in axial alinement with the motor-shaft, a coupling between the motor-shaft and each gearing shaft comprising a ring held by swivel-pins to forks terminating said shafts and adapted to allow universal fiection and variation of axial length of the compound shaft, substantially as described.

3. In a driving-gear for cars, the combina-.

tion of a shrouded motorwheel on the axle, a shrouded pinion carried in a casting borne by the axle, roller-bearings carried in boxes adapted to have end movement and provided with ball-bearing end contacts between said boxes and the motor-wheel face, substantially as described.

4. In a driving'mechanism for cars, in combination with the car-truck and motor monnted thereon, drivinggear sustained by the axle, a motor-shaft and a drivinggear shaft in axial alinement and united by a coupling adapted to have a universal flection, a bearing-arm attached to one or said shafts and engaging the other with spring connection, substantially as described.

5. In a driving mechanism forcars, in combination with the car-truek and motor mounted thereon, drivinggear sustained by the axle, a motor-shaft and a driving-gear shaft in axial alinement and united by a coupling adapted to have universal flection, a bearingarm attached to one of said shafts and engaging the other with double spring connection, substantially as described.

6. In a driving mechanism for cars, the combination of 'intermeshing shrouded gears and means for producing end thrust on the gears and thereby bringing the shrouds into engagement, substantially as described.

Detroit, March 23, 1897.

GEORGE KIRK MUNRO, JR.

\Vitnesses ANDREW FRED MUNRO, GEORGE KIRK MUNRo, Sr. 

